nptl/tst-exec1.c

   1 /* Simple exec test, only a thread in the parent.
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <paths.h>
  23 #include <pthread.h>
  24 #include <signal.h>
  25 #include <spawn.h>
  26 #include <stdbool.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30 #include <sys/wait.h>
  31
  32
  33 static void *
  34 tf (void *arg)
  35 {
  36   pthread_t th = (pthread_t) arg;
  37
  38   if (pthread_join (th, NULL) == 0)
  39     {
  40       puts ("thread in parent joined!?");
  41       exit (1);
  42     }
  43
  44   puts ("join in thread in parent returned!?");
  45   exit (1);
  46 }
  47
  48
  49 static int
  50 do_test (void)
  51 {
  52   int fd[2];
  53   if (pipe (fd) != 0)
  54     {
  55       puts ("pipe failed");
  56       exit (1);
  57     }
  58
  59   /* Not interested in knowing when the pipe is closed.  */
  60   if (sigignore (SIGPIPE) != 0)
  61     {
  62       puts ("sigignore failed");
  63       exit (1);
  64     }
  65
  66   posix_spawn_file_actions_t a;
  67   if (posix_spawn_file_actions_init (&a) != 0)
  68     {
  69       puts ("spawn_file_actions_init failed");
  70       exit (1);
  71     }
  72
  73   if (posix_spawn_file_actions_adddup2 (&a, fd[1], STDOUT_FILENO) != 0)
  74     {
  75       puts ("spawn_file_actions_adddup2 failed");
  76       exit (1);
  77     }
  78
  79   if (posix_spawn_file_actions_addclose (&a, fd[0]) != 0)
  80     {
  81       puts ("spawn_file_actions_addclose");
  82       exit (1);
  83     }
  84
  85   pthread_t th;
  86   if (pthread_create (&th, NULL, tf, (void *) pthread_self ()) != 0)
  87     {
  88       puts ("create failed");
  89       exit (1);
  90     }
  91
  92   pid_t pid;
  93   char *argv[] = { (char *) _PATH_BSHELL, (char *) "-c", (char *) "echo $$",
  94                    NULL };
  95   if (posix_spawn (&pid, _PATH_BSHELL, &a, NULL, argv, NULL) != 0)
  96     {
  97       puts ("spawn failed");
  98       exit (1);
  99     }
 100
 101   close (fd[1]);
 102
 103   char buf[200];
 104   ssize_t n;
 105   bool seen_pid = false;
 106   while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0)
 107     {
 108       /* We only expect to read the PID.  */
 109       char *endp;
 110       long int rpid = strtol (buf, &endp, 10);
 111
 112       if (*endp != '\n')
 113         {
 114           printf ("didn't parse whole line: \"%s\"\n", buf);
 115           exit (1);
 116         }
 117       if (endp == buf)
 118         {
 119           puts ("read empty line");
 120           exit (1);
 121         }
 122
 123       if (rpid != pid)
 124         {
 125           printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid);
 126           exit (1);
 127         }
 128
 129       if (seen_pid)
 130         {
 131           puts ("found more than one PID line");
 132           exit (1);
 133         }
 134
 135       seen_pid = true;
 136     }
 137
 138   close (fd[0]);
 139
 140   int status;
 141   int err = waitpid (pid, &status, 0);
 142   if (err != pid)
 143     {
 144       puts ("waitpid failed");
 145       exit (1);
 146     }
 147
 148   if (!seen_pid)
 149     {
 150       puts ("didn't get PID");
 151       exit (1);
 152     }
 153
 154   puts ("read correct PID");
 155
 156   return 0;
 157 }
 158
 159 #define TEST_FUNCTION do_test ()
 160 #include "../test-skeleton.c"